Bobbin-case-retaining device



(17a. 23, E923. Y w. G. TROHON BOBBIN CASE RETKINING DEVICE Filed June is, 1919 Patented Get. 23, 1923.

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lhd'ihtd WILLIAM G. Tnonon, or nasr nAnvnR-s, ASSACHUSETTS, nssrenon r0 unrrnn snon MACHINERY CORPQRATION', or rn'rnnson; new JERSEY, a conronarron OF NEW JERSEY.

BOBBINCASE-RETAINING DEVICE.

To allwhom it may concern.

Be it known that I, WILLIAM G. Tnonon, a citizen of the United States, residing at East'Danvers, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Bobbin-Case-Retaining Devices; and I do hereby declare the following to be a full, clear, and exact description of the inven tion, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to bobbin case retaining devices for sewing machines and more particularly to such devices for sewing machines of the type in which the bobbin case is mounted in a recess in a rotary oscillating shuttle located at the front of the machine.

In this type of sewing machine as commonly constructed, the bobbin case is retained in the recess in the shuttle and is prevented from oscillating with the shuttle by means of a retainer having a recess to receive the nose of the .bobbin case. This retainer is mounted upon a pivoted support and in certain sewing machines of this type, such as theone illustrated and described in the application for United States Letters Patent of Thoma-sill. Seeley, Serial .No. 122,002, filed Sept. 25, 1916, the pivoted sup portconstitutes the cover or door of a heat retaining and protective casing or hood. In the operation of these machines, wax accumulated from the waxed thread frequently causes the bobbin case to adhere more or less to the bobbin case retainer so that when the retainer is retracted by means of the pivoted support to permit accessto the bobbin or other parts of the machine, the bobbin and bobbin case frequently fall on the floor and the T thread becomes unwound. As these parts are quite hot, particularly when a heat retaining hood is em ployed, it is very inconvenient for the operator to handle and replace them in the machine.

Accordingly, one of the objects of the present invention is to provide novel and improved means for preventing displacement of the bobbin and bobbin case during the retraction of the bobbin case retainer.

With this object in view, one of the features of the present invention contemplates the provision in a sewing machine having a shuttle and a bobbin case mounted for relative rotary movement and a bobbin case retainer capable of being retracted therefrom, of means comprising a member adjacent a side of the bobbin case for preventing displacement. of the bobbin case during the retraction of said retainer and capable of being moved to permit the bobbin case to be removed and replaced. In the present embodiment of the invention said member consists of a spring arm extending across a side of the bobbin case and capable of being retracted therefrom by means of a handle forming an extension of said arm, although the broader features of the invention are not limited to this specific construction.

The several features of the present invention will be clearly understood from the following description and accompanying drawings in which:- 1

Figure 1 is a front elevation of a portion of a sewing machine embodying the features of the invention in their preferred form; Fig. 2 is a plan'view, partly in section, of the portion of the machine illustrated in Fig. 1; and Fig, dis a detailed perspec- 1 vapplication for" Letters Patent of Thomas H. Seeley, hereinbefore referred to and, accordingly, only so much oft-he machine is described herein as is necessary for an understanding of the present invention. This machine is provided with a loop taker in the form of a shuttle 10 which is rotatably oscillated in a shuttle race 12 at the front of the machine. The shuttle race constitutes, a part of a casing 14 having a lug 16 which is secured by a. bolt 18 to a lug 20 on the frame of the machine. The bobbin or locking thread is contained in a bobbin case 22 which is removably inserted in a recess in the front of the shuttle. The bobbin case is retained in the recess of the shuttle and is prevented from oscillating tical coil 38, a horizontal coil 40, and a d wnwardly projecting end portion 42. The bolt 18 and lugs 16 and are conveniently V utilized to secure the improved device: in

position, the bolt being inserted through "the horizontal coil with the :coil located beparatively slight tween the head of the bolt and-the lug =20,

' and the downwardlyl projecting end portion 42 engagingthe rear side of the lug 16 to prevent the device from turning laterally. The arm. 32 is suitably bent to clear: the

casing 14: and the free end of the arm is turned forwardly and is spaced slightlyi from the bobbin case in order not to inter v fere with the bobbin thread in passing across the bobbin case.

With this construction, it will be seen that upon opening the door 30 the arm'32-wil1" yieldingly, stripthe bobbin case from the retainer on the door and retain the bobbin 7 case in the recess in the shuttle.

The arm: 32 may, be moved upwardly across the bobbin case, :to permit removal and replacement of the bobbin case, by

means of the handle 36, the coil 38 which .is interposed between the handle andthe sta tionary portion of the device permitting'the arm to be thus moved with; only a comapplication of pressure on the handle.

The nature and scope of the present invention having been indicated and a machine' embodying the several features of the in vention in their preferred form having been specifically described, what is claimedis 1. A sewing machine having, in combina-- tion, a shuttle and a bobbin case mounted for relative rotary movement, a retainer for the bobbin case capable of being reing displacement of the bobbin caseduring the retraction of said retainer comprising a spring arm extending acrossaa side'of-the bobbin case.

2. A sewing machine having, in-combina'-- tion, ashuttle and Ya bobb1n=casemounted" for relatlve rotary movement,-a retainer for stituting "a handle :for 'movin armlto permit the removal 0 the bobbinbobbin case. tracted therefrom, and means-for preventholding the bobbin case in the shuttle ca pable ofbeing retracted therefrom, and

means for preventing .displacementxof the V retainer, and capable of being moved to bobbin case during the retraction of said permit the'removal of'the' bobbin case'com-V prising an arm extending across "a slde of the bObbin case 1,

8. A sewing machine having,'in"combina-- 7 tion, ashuttle andv a bobbin case mounted for relative rotary movement, a retainer for the bobbin case capable ofbeing retracted therefrom, means comprising a springiiarm I extending across aside of the bobbin case for preventing displacement. ofzthe bobbin I 7 1 case during the retraction of said retainer,

and an extension of therspring arm "con.-

case.

the spring 4:. A sewing machine having, incombination, a shuttle and a 'bo'bbincase'mounted*3 for relative rotary movement, a retainer for 1 the bobbin case'capable'of being retracted L therefrom, and means comprising a member 8.0 adjacent aside of the bobbincase-'toiengage and prevent displacement of the bobbincasei during the retractioniof said-retainer.

5. A sewing machine having,in combina tion, a shuttle and a bobbin case1mounted 'for relative rotary movement, a retainer for V holding :the bobbin casein the shuttleccapable of being retracted! therefrom, and spring arm mounted independently ofsaid retainer and extending a'cross'a side 'ofthe" bobbin case-"for preventing displacement of. the bobbin case during the retraction of said retainer. I

6. A sewing machine'l-having'in combines 7 tion, a shuttle and axbobbin'casev-mounted for relative rotary movement, a retainerfor the bobbin 'case'capable' of being retracted '.there'from, and 'means' for preventing dis-.

placement of the bobbin case during'the re "-5 traction of said retainer, said means'capable 01": being retracted to permit removal of {the 7. A sewing machine having, incombina-t .tion, a' shuttleanda bobbin'case mounted 1 for relative rotary movement, a'retainer: for "the bobbin case capableof being retracted therefrom, and means arrangedadjacentthe retainer forpreventing displacement ofthe bobbincase." V

' 'WILLIAM G. T'RQHON 

